Electrical Stimulation Effect on Ankle Instability During Walking in Virtual Reality Setup

Inclusion Criteria: * Age 18 - 39 years. * Having at least one significant ankle sprain in the past year, which causes a minimum of one interrupted day of physical activity. * Having a history of at least two ankle sprains or "giving way" sensations at the injured ankle and/or a history of general feeling of ankle joint instability associated with the fear of getting another acute ankle sprain. * Score \< 24 in the Cumberland Ankle Instability Tool (CAIT), and/or \> 11 in the Identification of Functional Ankle Instability (IdFAI), and/or answer ''yes'' to at least 5 yes/no questions in the Ankle Instability Instrument (AII). Exclusion Criteria: * Any head, neck, or face injury in the six months prior to the study (e.g., concussion, eye injury). * History of vestibular or ocular dysfunction. * Currently taking any medications affecting balance (i.e. antibiotics). * History of injuries to lower extremities including fractures, knee injuries, and hip injuries. * Sustaining an ankle sprain injury in the last 6 weeks. * Pregnancy * Any neurological disorders (e.g., seizure disorders, closed head injuries with loss of consciousness greater than 15 minutes, CNS neoplasm, history of stroke) * Unstable cardiac or pulmonary disease. * Clinically obese (BMI 30 or above). * Any metal implant in the feet or legs that is close to the stimulating electrodes. * A known allergy to medical-grade adhesives. * Any other comorbidity affecting the ability to safely walk without assistance for a…